This connector is for 2.5" internal harddisks.
 (at the controller & peripherals)
 (at the controller & peripherals)
 (at the cable)
 (at the cable)
40 PIN IDC (0.75") MALE at the controller & peripherals.
40 PIN IDC (0.75") FEMALE at the cable.
| Pin | Name | Dir | Description | 
|---|---|---|---|
| 1 | +5V |  | +5 VDC | 
| 1 | +5V |  | +5 VDC | 
| 1 | RET |  | Return (Ground?) | 
| 1 | RET |  | Return (Ground?) | 
| 1 | GND |  | Ground | 
| 2 | DB0 |  | Data Bus 0 | 
| 1 | GND |  | Ground | 
| 4 | DB1 |  | Data Bus 1 | 
| 1 | GND |  | Ground | 
| 6 | DB2 |  | Data Bus 2 | 
| 1 | GND |  | Ground | 
| 8 | DB3 |  | Data Bus 3 | 
| 1 | GND |  | Ground | 
| 10 | DB4 |  | Data Bus 4 | 
| 1 | GND |  | Ground | 
| 12 | DB5 |  | Data Bus 5 | 
| 1 | GND |  | Ground | 
| 14 | DB6 |  | Data Bus 6 | 
| 1 | GND |  | Ground | 
| 16 | DB7 |  | Data Bus 7 | 
| 1 | GND |  | Ground | 
| 18 | PARITY |  | Data Parity (odd Parity) | 
| 24 | GND |  | Ground | 
| 26 | TMPWR |  | Termination Power | 
| 32 | /ATN |  | Attention | 
| 36 | /BSY |  | Busy | 
| 24 | GND |  | Ground | 
| 38 | /ACK |  | Acknowledge | 
| 40 | /RST |  | Reset | 
| 42 | /MSG |  | Message | 
| 24 | GND |  | Ground | 
| 44 | /SEL |  | Select | 
| 50 | /I/O |  | Input/Output | 
| 46 | /C/D |  | Control/Data | 
| 24 | GND |  | Ground | 
| 48 | /REQ |  | Request | 
| 1 | RET |  | Return (Ground?) | 
| 1 | RET |  | Return (Ground?) | 
| 1 | +5V |  | +5 VDC | 
| 1 | +5V |  | +5 VDC | 
Note: Direction is Device relative Bus (other Devices).
Connector is: AMP 6-176135
| Contributor: | Joakim Ögren | 
| Source: | Electrical Interface Spec for IBM DPRS-20810 and DPRS-21215 at IBM Hard disk drive support | 
  Copyright © The Hardware Book Team 1996-2004.
  May be copied and redistributed, partially or in whole, as appropriate.
  Document last modified: 2002-01-13